Home / 30,939.48-42,694.08-18,193.16

Finding the Fourth Proportional to 30,939.48, 42,694.08 and 18,193.16

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Solution

The fourth proportional to 30,939.48, 42,694.08 and 18,193.16 is: 25,105.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,939.48 : 42,694.08 = 18,193.16 : x
  2. Step 2: Convert to fraction form
    30,939.48/42,694.08 = 18,193.16/x
  3. Step 3: Cross multiply
    30,939.48x = 42,694.08 × 18,193.16
  4. Step 4: Simplify right side
    30,939.48x = 776,740,228.49
  5. Step 5: Solve for x
    x = 776,740,228.49/30,939.48
  6. Step 6: Final answer
    x = 25,105.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.